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MSC Fatigue User’s Guide
Fatigue Theory
Introduction
Background
The History of Fatigue
High Cycle versus Low Cycle Fatigue
Summary
Inputs to Fatigue Life Estimation Models
Total Life (S-N) Analysis
Stress Cycles
The S-N Curve
Procedure for Determining the S-N Curve
Limits of the S-N Curve
Tensile Properties and the S-N Curve
The Influence of Mean Stress
Factors Influencing Fatigue Life
Application in MSC.Fatigue
Crack Initiation/Strain-Life (ε‑N) Analysis
The Microscopic Aspects of Fatigue Failure
The Strain-Life Methodology
Monotonic Stress-Strain Behavior
Cyclic Stress-Strain Behavior
The Strain-Life Curve
Strain-Life vs. Stress-Life
Transition Life
The Effect of Mean Stress
Factors Influencing Fatigue Life
Application in MSC.Fatigue
The Statistical Nature of Fatigue
Representation of Fatigue Data on a Statistical Basis
The Statistical Distribution Function
Probability of Failure at a Finite Life
Probability of Failure for Infinite Life
Handling Statistics Under Random Loading Conditions
The Absolute Accuracy of Fatigue Life Estimation
Estimating Material Cyclic Properties From UTS & E